Real VNC connect to Windows 7

LAN Network
Im running real VNC Free 4.1.3 Service/Viewer on a windows 7 64 bit PC.

When i try to remote to another windows 7 64 bit PC i get prompt for a password - enter correct password - then an error message - "read: connection aborted (10053)" Do you wish to attempt to reconnect to x.x.x.x? - click yes - Same error...

The firewall is off and windows defender is also disabled on both PCs.

I do not have an issue connecting to windows XP machines.

Any ideas on how to get VNC Viewer working with windows 7?

Thanks